1. Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA
2. Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA
3. Biostatics and Bioinformatics Shared Facility, Comprehensive Cancer Center, Division of Preventive Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
4. Department of Physiology, Medical College of Georgia, Augusta, GA, USA
5. Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, AL, USA